电压暂降事件分类及短路类型识别研究

Research on Voltage Sag Event Classification and Short Circuit Type Identification

随着现代化敏感电力电子设备的广泛应用以及新型电力负荷的迅速发展,电能质量问题日益受到关注,其中最为突出的就是电压暂降。为了更好地研究电压暂降对电力系统的影响,文中首先根据来源电压暂降事件进行分类,主要来源包括短路故障、大型电机启动和雷电等。接下来对短路故障引起电压暂降进行识别,使电压暂降系统能够根据监测到的暂降波形识别出短路故障类型。最后通过江苏电网电压暂降监测系统中的数据波形的案例分析,归类到4种典型短路故障分类,验证了文中算法的可行性。

With the rapid development of modern power electronic devices and the rapid development of the new type of power load,the problem of power quality is paid more and more attention.In order to study the voltage sags better impact on the power system,firstly,according to the source voltage sag event classification,including the main source of short-circuit fault,large motor starting and lightning,then the voltage sags caused by short circuit fault identification,can make the voltage sag monitoring system according to the waveform recognition a fault type.Finally,through the case analysis of the data waveform of the voltage sag monitoring system in Jiangsu power grid,the paper classifies the four kinds of typical short circuit faults,and verifies the feasibility of the algorithm.